ShakotanGazelle

Thank you! But what about the actual plastic gear that sits on the shaft inside the tail housing? Am I doomed to track down a blown 5 speed and modify it to work? Or is there a direct replacement for the s15 gearbox?

dwnshft2drft

They did not mention that gear part number. You need to modified other gears for test fit.
And for the extension housing you already have it.

itsjustdaphne

And this one is done too.....
Time to go 350z trans, finally.
There's a video on my IG of how noisy it is.
The last trans did the same thing until it just didn't want to go into gear at all and I'd get stuck in neutral while driving.

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Kingtal0n

If you drive it nice, it can last a long time at 400bhp. No hard launches, no slicks, no drifting, no terrible clutch kicks.

The only reason I am not using a six speed right now is because of their cir-clip issue.

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itsjustdaphne

Riding in a tow truck at 3am. Just toasted the 3rd trans. Awesome.

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S13GG

Did you figure this out?

I used the USDM "speedo drive gear" to suit my chassis, ie: speed sensor (5MT - KA - 95) and had it enlarged to fit (I.D.) 28mm.

This part is inside the transmission on the output Shaft, so get the parts guy that has experience with the exploded diagrams, and not the 18yr old.

ShakotanGazelle

I got a blown 5 speed for free so that's here I'm gonna steal that part from.

Anyone got the 6mt bell housing bolt sizes or a set I can buy? Bought a 5mt set but half the bolts are way too short - go figure

mik5082

circlip modification by neat gearboxes

https://neatgearboxes.wordpress.com/...x-circlip-mod/

ShakotanGazelle

so what do s13 6 speed guys use for driveshafts? the s15 one i have is too long and the carrier bearing is like 6" too far back.

slow_sr20

If anyone is planning to ditch the dual mass flywheel, keep in mind that you will most likely need standard s13/s14 flywheel bolts. The s15 bolts are way too long. ARP seemed to be the cheapest. That's what I used with a Nismo/Autech flywheel.

slow_sr20

Is there anyone out there with confirmed drive shaft fitment info? my car is s14/abs car. I purchased what i was told is a 6-speed s15 drive shaft. Fits into output of transmission just fine but is too long. The rear section from diff to carrier is off by 1/2" approx. The front section is entirely too long by probably 2-3". Anyone else compile any data? I figure i can locate a stock rear section and have the front section shortened, but was hoping for a bolt in solution.

Goldhawg

I have an Autech S15/6 speed that I'm swapping in a Datsun roadster. It has 60K miles on it. I'm thinking that I should at least replace the clutch disc before I install in the car. thoughts? What clutch disc should I get to replace the one I have?

rcefoonia

Amazing write up we don't even have this much info in AUS about the gearbox.

rcefoonia

dam great job on the post

Kingtal0n

I was re-reading this for some info about the gear ratios and using a calculator came up with a different gear spread, here is the modified version

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LoSt180

You should probably keep the final drive the same for a gear set comparison. I'm curious what an S14 5-speed looks like compared to an S15 6-speed, both with 3.692 FD.

3.916 was only on A/T cars, 3.692 was M/T, and 4.08 was NA and all USDM models.

chulme1234

Quick question if somebody dosent mind answering....

Bought a S15 6MT to put on my SR20DE drift car

It came with the shifter, but no knob so I bought an eBay special, I've tested all the gears and its fine...

But how do I engage reverse?! I've tried pushing down and pulling up but no luck? Do I need a special gearknob to pull up?

Bit confused haha

Sorry if this sounds stupid!


Also sorry again for bumping an old thread

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dorkidori_s13

its a 90s 6 speed... so probably just push all the way to left and up, or all the way to the right and up or down. no need to push down or pull up on the gear shift.

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chulme1234

Looking at pics on one of the first few pages and it's all the way across right and down, next to 6th, sure I tried that though

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dwnshft2drft

Do you have it installed already?

chulme1234

Yes mate

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dwnshft2drft

Theres a reset trick. Have some one push the car reverse while you engage clutch then force it to reverse. I had the engine running and be safe though.

chulme1234

What I'm asking is do you have to push the knob down or anything to put it in reverse?

I know how reverse works

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dwnshft2drft

This is correct no downs or ups. If you still cant put it in reverse. Try the Japanese trick I posted.

chulme1234

How does that work? Do you keep pushing to the right and try put it in reverse?

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dwnshft2drft

Yes mate, while someones pushing the car reverse. Try it and let me know if this works. If it does I'll tell you what went wrong.

TheRealSy90

All the way right and down how hard is that to understand.

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chulme1234

Because I didn't know that?

No need for the attitude.
Wicked cheers for the helpful comments buddy!

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dwnshft2drft

He's doing it right but he was just confused

dwnshft2drft

No sweat mate! Hey wonder if you can help me out to find me a s15 evaporator box and s14a front bumper side cover/caps? (pictured)